package cn.smbms.filter;

import java.io.IOException;
import java.net.URLEncoder;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import cn.smbms.pojo.User;
import cn.smbms.tools.Constants;
public class Visited implements Filter {

	@Override
	public void init(FilterConfig filterConfig) throws ServletException {
		// TODO Auto-generated method stub

	}

	@Override
	public void doFilter(ServletRequest request, ServletResponse response,
			FilterChain chain) throws IOException, ServletException {
		  HttpServletRequest req = (HttpServletRequest) request;
	        HttpServletResponse resp = (HttpServletResponse) response;
	      User user=(User)req.getSession().getAttribute(Constants.USER_SESSION);
	      if(user==null){
	    	  resp.sendRedirect(req.getContextPath()+"/login.jsp");
	      }else{
	    	  chain.doFilter(request, response);
	      }
	}

	@Override
	public void destroy() {
	}

}
